The corrugated board has a very important impact on printing, directly or indirectly determining the quality of printed matter. Due to different paper properties, different abnormalities will occur in the process of making corrugated cardboard, which will bring various defects to carton printing. Let’s take a look at the impact of different abnormal situations of cardboard on carton printing:
(1)cardboard curved
Cardboard warping is the most common anomaly, which will mainly lead to the following quality problems in carton printing:
1, printing slot running
2, the color is not correct
3, printing shadow
4, Easy paper jam stops in the production process
The recommended solution is as follows:
1, the positive and negative pressure of the cardboard spray steam, flattened with heavy objects
2, emergency practice, folding line, slow down production and strengthen inspection
3. Printing plate adopts auxiliary lamination to avoid shadow and reduce the running value
Here to remind you: must be flat cardboard and curved cardboard separate production.
(2) paper water absorption is poor
In production management, poor water absorption of base paper often leads to the whitening of printing, which is also the most common problem in high-strength cow cards. The carton of high-strength cow card generally has high requirements, which is particularly obvious when printing large color blocks, which is easy to lead to the occurrence of abnormal quality.
Common solutions are as follows:
1, increase the moisture of the paper, using manual wiping, or spray and printing water to select printing
2, ink adjustment, improve ink permeability, and ink quality
3, clear roller to enhance the transfer of ink
4. The hardness of the printing plate is reduced, and the amount of ink transfer is improved
Different solutions can be considered in different situations. Enterprises can make their own solutions according to their own product features, equipment and production environment.
(3)paper material collocation
Due to the increasing pressure of industry competition, enterprises in the material collocation will do incisively and vividly. But products are often unstable, sometimes good and sometimes bad, even the same product is very different. Among them, the most common is that the weight of the septum paper is too low. The most common problems are as follows:
1, the printing is plain, and not in the same position, some good, some bad
2, the pressure is not stable, some qualified and some unqualified
The above two problems are the most difficult to detect. From the perspective of production management, we must check whether there is a problem with the production process of cardboard and carton, and then check whether there is a problem with the printing plate and equipment. Through many tests, in fact, the simplest way is to cut the white part of the cardboard, and then it is found that the septum paper is damaged, leading to no compression, so the same is the case for compression. Therefore, in the configuration of paper separation process must consider the requirements of printing surface and quality, reasonable collocation of materials.